Cisco Desk Phone 9800 Series Guide: 9811 vs 9841 vs 9851 vs 9861 vs 9871
The Cisco Desk Phone 9800 Series is Cisco’s current desk phone line: five models (9811, 9841, 9851, 9861, 9871) plus one Key Expansion Module, all running a single PhoneOS software image that registers to Cisco Unified Communications Manager (CUCM) 12.5 or later, Webex Calling, BroadWorks, and certified third-party platforms. The tiers are simple: 9811 for common areas, 9841 for standard desks, 9851 for multi-line users, 9861 for reception and call handling, and 9871 for a touchscreen flagship. One boundary matters before any model choice: the 9800 does not register to a CME router, so branch sites running router-based call control need a platform plan first.
| Model | Display | Physical line keys | Max lines (CUCM) | Wi-Fi / Bluetooth | PoE class | KEM support |
|---|---|---|---|---|---|---|
| 9811 | 2.6″ grayscale | 2 | 2 | No | Class 2 | No |
| 9841 | 3.5″ grayscale, backlit | 4 | 4 | No | Class 2 | No |
| 9851 | 3.7″ color | 6 | 46 | No | Class 3 | 1 |
| 9861 | 5″ color | 10 | 130 | Yes (NR variant: no) | Class 3 | Up to 3 |
| 9871 | 5″ color touch | Touch UI | 128 | Yes (NR variant: no) | Class 3 | Up to 3 |
What Separates the Five Desk Phone 9800 Models
The series splits into three hardware tiers. The 9811 and 9841 are grayscale, PoE Class 2 phones with no KEM support, built for desks that need reliable calling and little else; the 9811 has no USB port at all, while the 9841 carries a single low-power USB-A port. The 9851 moves to a color display, six line keys with 46 programmable lines, USB-A and USB-C ports, and single-KEM support. The 9861 and 9871 add Wi-Fi 802.11ac, Bluetooth 5.2, a built-in ThousandEyes agent for network path monitoring, and the deepest AI audio feature set, including noise removal for incoming audio.
AI audio is tiered too: outbound background noise removal runs on every model except the 9811, while inbound noise removal and narrowband-to-wideband audio enhancement are reserved for the 9861 and 9871.
9841 vs 9851: Where the Price Step Buys Real Capability
The 9851 is the first model that behaves like a manager’s phone. Against the 9841 it adds a color display, six physical keys against four, a jump from 4 to 46 supported lines, both USB port types for headsets and charging, and KEM eligibility. It also moves from PoE Class 2 to Class 3, which matters for switch PoE budgets. If the user handles more than a couple of shared lines or needs a wired USB headset, the 9851 is the sensible floor.
9861 vs 9871: Buttons or Touchscreen
Both top models share the 5-inch display size, wireless radios, ThousandEyes, and triple-KEM capability, so the decision is the interface. The 9861 keeps 10 physical line keys and up to 130 lines on CUCM, which suits receptionists and anyone who dials by muscle memory. The 9871 replaces the key field with a 1280×720 touchscreen and handles up to 128 lines. Feature depth is nearly identical; pick by how the user actually operates the phone.
Why the 9811 Is the Odd One Out
The 9811 is the only model with a 10/100 Ethernet switch rather than gigabit, ships with a narrowband handset by default, and has no USB ports. It also skips hot desking, one-button meeting join, and Webex Companion, and it requires CUCM 14 or later, while every other model registers to CUCM 12.5 and later. On a desk shared with a PC that has gigabit cabling, the 9811’s 10/100 pass-through port becomes the bottleneck, so keep it to lobbies, break rooms, and other spots where nothing sits behind the phone.
Which Call Control Platforms the 9800 Series Supports
Per the March 2026 data sheet, the certified list is CUCM (12.5 and later; 14 and later for the 9811, with a device package required on some versions), Webex Calling, Webex Dedicated Instance, Cisco BroadWorks, Microsoft SIP Gateway, and Asterisk. There is no separate MPP or enterprise firmware to choose at order time: one PhoneOS image covers every platform, which removes the firmware-variant mistake that complicated 7800 and 8800 purchasing.
One sizing limit hides in the fine print: a 9800 registered to Webex Calling or an open SIP platform supports up to 16 SIP lines, while CUCM and Webex Dedicated Instance support up to 130. A reception desk that lives on shared-line appearances belongs on CUCM, or needs its line plan rechecked before a cloud migration.
Using the 9800 with CUCM and a Branch Voice Gateway
Most branch deployments pair CUCM with a local router that terminates PSTN circuits. That role is unaffected by the phone generation: an ISR4331 or Catalyst 8300 carrying the analog voice cards and DSP resources its platform supports, such as the NIM-4FXS or NIM-2FXS-4FXO for ports and the NIM-PVDM series for DSPs, is a trunk between the phone system and the PSTN, and it never needs to know which phone model placed the call. The same hardware serves as a Local Gateway when call control moves to Webex Calling.
The data sheet also lists Survivable Remote Site Telephony (SRST) support, so a branch full of 9800 phones can fall back to the local gateway router for dial tone when the WAN link to CUCM drops. Feature behavior in fallback mode is platform-dependent, so verify the survivability feature set against your IOS XE release during deployment planning. For choosing the gateway hardware itself, see our Catalyst 8300 and 8200 module guide.
Can the 9800 Register to a CME Router?
No. Cisco’s Phone Feature Support Guide for Unified CME and SRST, last updated April 2019 and covering releases through Unified CME 12.6, ends its endpoint list at the 7800 and 8800 series, and no CME platform appears in the 9800’s certified platform table. The router side is not the problem: per Cisco’s Unified CME platform compatibility matrix, CME 14.1 runs on ISR 4000, Catalyst 8200, and Catalyst 8300 from IOS XE 17.6.1a onward. The endpoint side is: the phone has no path to register to it.
A site running CME as its phone system has two workable routes. Keep the CME estate on 7800 series and 8800 series hardware, which CME fully supports and which remains available new and refurbished. Or move call control to CUCM or Webex Calling and demote the router to the gateway role above, after which the 9800 becomes orderable.
PoE Class, Power Adapters, and KEM Rules
No 9800 phone ships with a power supply. Cisco’s 2026 end-of-life notices for the 7800 series state this directly for migration planning: the 9800 series is powered by PoE, and regional power supplies are ordered separately as Cisco Power Adapter 3 (CP-PWR-ADPT-3 with a region suffix). If your switch ports deliver PoE, nothing extra is needed; the 9811 and 9841 draw Class 2, and the 9851, 9861, and 9871 draw Class 3.
KEM count depends on how the phone is powered:
| Model | KEMs on PoE | KEMs with Power Adapter 3 |
|---|---|---|
| 9811 / 9841 | Not supported | Not supported |
| 9851 | 1 | 1 |
| 9861 / 9871 | 1 | Up to 3 |
The DP-9800-KEM adds 20 physical keys across 2 pages and draws all of its power from the host phone. A reception build that needs two or three KEMs on a 9861 or 9871 must include the power adapter in the order even when the switch port offers PoE.
Decoding 9800 Ordering Codes Before You Buy
| Code element | Meaning |
|---|---|
| DP-98×1-K9= | Base model, Carbon Black |
| -L | First Light (light color) finish |
| NR on 9861/9871 | No Radio: Wi-Fi and Bluetooth removed |
| NR on 9841/9851 (TAA and Customized part numbers) | No NFC (these models never had Wi-Fi or Bluetooth to remove) |
| ++= | TAA-compliant model |
| –= | Customized model |
| -A | Arabic keypad layout (9861/9871) |
| DP-9800-KEM= / DP-9800-WMK= | Key Expansion Module / wall mount kit |
| DP-9800-WMK-88ADP= | Wall mount kit adapter for sites with existing 8800 mounts |
The NR suffix is the trap in this table: on the 9861 and 9871 it deletes the wireless radios, while on TAA 9841 and 9851 part numbers it only removes the NFC tag used for onboarding. Ordering a DP-9861NR-K9= for a desk that expected Bluetooth headset pairing is an avoidable RMA. For refresh projects, price in the DP-9800-WMK-88ADP= adapter where 8800 phones hang on walls today, and confirm its fit for your mount type on the accessory page before ordering in volume.
Which 9800 Model Replaces Your 7800 or 8800 Phone
If your fleet runs CME, or you are extending an existing deployment with matching handsets and accessory pools, buying more 8800 series hardware remains a legitimate choice; the core desk models 8811, 8841, 8851, and 8861 had no end-of-life notice published as of July 2026. For everyone else planning new desks, Cisco’s own migration mapping now points to the 9800.
| Current phone | Lifecycle status (official notices) | Official successor |
|---|---|---|
| 7811 | End of sale October 28, 2026; support ends October 31, 2031 | Desk Phone 9811 |
| 7821 | End of sale October 28, 2026; support ends October 31, 2031 | Desk Phone 9841 |
| 7832 conference | End of sale October 28, 2026; support ends October 31, 2031 | IP Conference Phone 8832 |
| 8845 video | End of sale July 27, 2024; support ends July 31, 2029 | 8865 at announcement; see 8865 row |
| 8865 video | End of sale April 26, 2025; support ends July 31, 2030 | Video Phone 8875 |
| 7841, 7861, 8811, 8841, 8851, 8861 | No end-of-life notice as of July 2026 | Still orderable; see guidance below |
Lifecycle dates are from Cisco end-of-life bulletins EOL15899, EOL15900, EOL15902 (April to May 2026), EOL15261, and EOL15614. The 2026 bulletins name the Desk Phone successors directly and note that remanufactured units remain purchasable through Cisco Refresh until the last date of support.
Two rows deserve attention. The conference 7832 maps to the 8832, because the 9800 series contains no conference phone. And the video chain is genuinely disruptive: the 8845 was mapped to the 8865 in 2024, the 8865 itself went end-of-sale in 2025 with the Video Phone 8875 as its named successor, and the 8865’s video KEM has no replacement product at all. No 9800 model has a camera, so video-calling desks leave the series entirely.
For models without notices, our recommendation follows the hardware tiers: 7841 users fit the 9841, or the 9851 where color and USB matter; 7861 and 8851 users map naturally to the 9851 or 9861; 8861 users and anyone running KEMs should evaluate the 9861; executive desks that want touch go to the 9871. Cisco has published no mapping for these models, so treat these pairings as editorial guidance and validate line counts and headset requirements per user before a bulk order.
FAQ
Does the Desk Phone 9800 work with Zoom Phone?
Zoom Phone is not in the 9800’s certified platform table as of the March 2026 data sheet. Community reports describe provisioning 9800 phones as generic SIP devices with reduced features, but that is not a basis for a fleet purchase; check Zoom’s certified hardware list before committing.
Does any 9800 model support video calls?
No 9800 model has a camera. The current Cisco video desk phone is the 8875, which Cisco named as the official replacement for the 8865 in the migration table above.
Can we keep running 7811, 7821, and 7832 phones after October 2026?
Yes. End of sale stops new orders, not operation. Security fixes may continue until October 27, 2029, and contract support runs to October 31, 2031 for these models. For how to run end-of-sale hardware safely, see can Cisco EOL equipment still be used.
Do 9800 phones need their own license?
License requirements are set on the calling platform side, and entitlement details vary by platform and agreement type, so confirm the device entitlement path in your platform’s licensing terms before ordering.
